summaryrefslogtreecommitdiffstats
path: root/sound/soc/intel/sst/sst.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/soc/intel/sst/sst.c')
-rw-r--r--sound/soc/intel/sst/sst.c437
1 files changed, 437 insertions, 0 deletions
diff --git a/sound/soc/intel/sst/sst.c b/sound/soc/intel/sst/sst.c
new file mode 100644
index 0000000..8a8d56a
--- /dev/null
+++ b/sound/soc/intel/sst/sst.c
@@ -0,0 +1,437 @@
+/*
+ * sst.c - Intel SST Driver for audio engine
+ *
+ * Copyright (C) 2008-14 Intel Corp
+ * Authors: Vinod Koul <vinod.koul@intel.com>
+ * Harsha Priya <priya.harsha@intel.com>
+ * Dharageswari R <dharageswari.r@intel.com>
+ * KP Jeeja <jeeja.kp@intel.com>
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/interrupt.h>
+#include <linux/firmware.h>
+#include <linux/pm_runtime.h>
+#include <linux/pm_qos.h>
+#include <linux/async.h>
+#include <linux/acpi.h>
+#include <sound/core.h>
+#include <sound/soc.h>
+#include <asm/platform_sst_audio.h>
+#include "../sst-mfld-platform.h"
+#include "sst.h"
+#include "../sst-dsp.h"
+
+MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
+MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
+MODULE_DESCRIPTION("Intel (R) SST(R) Audio Engine Driver");
+MODULE_LICENSE("GPL v2");
+
+static inline bool sst_is_process_reply(u32 msg_id)
+{
+ return ((msg_id & PROCESS_MSG) ? true : false);
+}
+
+static inline bool sst_validate_mailbox_size(unsigned int size)
+{
+ return ((size <= SST_MAILBOX_SIZE) ? true : false);
+}
+
+static irqreturn_t intel_sst_interrupt_mrfld(int irq, void *context)
+{
+ union interrupt_reg_mrfld isr;
+ union ipc_header_mrfld header;
+ union sst_imr_reg_mrfld imr;
+ struct ipc_post *msg = NULL;
+ unsigned int size = 0;
+ struct intel_sst_drv *drv = (struct intel_sst_drv *) context;
+ irqreturn_t retval = IRQ_HANDLED;
+
+ /* Interrupt arrived, check src */
+ isr.full = sst_shim_read64(drv->shim, SST_ISRX);
+
+ if (isr.part.done_interrupt) {
+ /* Clear done bit */
+ spin_lock(&drv->ipc_spin_lock);
+ header.full = sst_shim_read64(drv->shim,
+ drv->ipc_reg.ipcx);
+ header.p.header_high.part.done = 0;
+ sst_shim_write64(drv->shim, drv->ipc_reg.ipcx, header.full);
+
+ /* write 1 to clear status register */;
+ isr.part.done_interrupt = 1;
+ sst_shim_write64(drv->shim, SST_ISRX, isr.full);
+ spin_unlock(&drv->ipc_spin_lock);
+
+ /* we can send more messages to DSP so trigger work */
+ queue_work(drv->post_msg_wq, &drv->ipc_post_msg_wq);
+ retval = IRQ_HANDLED;
+ }
+
+ if (isr.part.busy_interrupt) {
+ /* message from dsp so copy that */
+ spin_lock(&drv->ipc_spin_lock);
+ imr.full = sst_shim_read64(drv->shim, SST_IMRX);
+ imr.part.busy_interrupt = 1;
+ sst_shim_write64(drv->shim, SST_IMRX, imr.full);
+ spin_unlock(&drv->ipc_spin_lock);
+ header.full = sst_shim_read64(drv->shim, drv->ipc_reg.ipcd);
+
+ if (sst_create_ipc_msg(&msg, header.p.header_high.part.large)) {
+ drv->ops->clear_interrupt(drv);
+ return IRQ_HANDLED;
+ }
+
+ if (header.p.header_high.part.large) {
+ size = header.p.header_low_payload;
+ if (sst_validate_mailbox_size(size)) {
+ memcpy_fromio(msg->mailbox_data,
+ drv->mailbox + drv->mailbox_recv_offset, size);
+ } else {
+ dev_err(drv->dev,
+ "Mailbox not copied, payload size is: %u\n", size);
+ header.p.header_low_payload = 0;
+ }
+ }
+
+ msg->mrfld_header = header;
+ msg->is_process_reply =
+ sst_is_process_reply(header.p.header_high.part.msg_id);
+ spin_lock(&drv->rx_msg_lock);
+ list_add_tail(&msg->node, &drv->rx_list);
+ spin_unlock(&drv->rx_msg_lock);
+ drv->ops->clear_interrupt(drv);
+ retval = IRQ_WAKE_THREAD;
+ }
+ return retval;
+}
+
+static irqreturn_t intel_sst_irq_thread_mrfld(int irq, void *context)
+{
+ struct intel_sst_drv *drv = (struct intel_sst_drv *) context;
+ struct ipc_post *__msg, *msg = NULL;
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&drv->rx_msg_lock, irq_flags);
+ if (list_empty(&drv->rx_list)) {
+ spin_unlock_irqrestore(&drv->rx_msg_lock, irq_flags);
+ return IRQ_HANDLED;
+ }
+
+ list_for_each_entry_safe(msg, __msg, &drv->rx_list, node) {
+ list_del(&msg->node);
+ spin_unlock_irqrestore(&drv->rx_msg_lock, irq_flags);
+ if (msg->is_process_reply)
+ drv->ops->process_message(msg);
+ else
+ drv->ops->process_reply(drv, msg);
+
+ if (msg->is_large)
+ kfree(msg->mailbox_data);
+ kfree(msg);
+ spin_lock_irqsave(&drv->rx_msg_lock, irq_flags);
+ }
+ spin_unlock_irqrestore(&drv->rx_msg_lock, irq_flags);
+ return IRQ_HANDLED;
+}
+
+static int sst_save_dsp_context_v2(struct intel_sst_drv *sst)
+{
+ int ret = 0;
+
+ ret = sst_prepare_and_post_msg(sst, SST_TASK_ID_MEDIA, IPC_CMD,
+ IPC_PREP_D3, PIPE_RSVD, 0, NULL, NULL,
+ true, true, false, true);
+
+ if (ret < 0) {
+ dev_err(sst->dev, "not suspending FW!!, Err: %d\n", ret);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+
+static struct intel_sst_ops mrfld_ops = {
+ .interrupt = intel_sst_interrupt_mrfld,
+ .irq_thread = intel_sst_irq_thread_mrfld,
+ .clear_interrupt = intel_sst_clear_intr_mrfld,
+ .start = sst_start_mrfld,
+ .reset = intel_sst_reset_dsp_mrfld,
+ .post_message = sst_post_message_mrfld,
+ .process_reply = sst_process_reply_mrfld,
+ .save_dsp_context = sst_save_dsp_context_v2,
+ .alloc_stream = sst_alloc_stream_mrfld,
+ .post_download = sst_post_download_mrfld,
+};
+
+int sst_driver_ops(struct intel_sst_drv *sst)
+{
+
+ switch (sst->dev_id) {
+ case SST_MRFLD_PCI_ID:
+ case SST_BYT_ACPI_ID:
+ case SST_CHV_ACPI_ID:
+ sst->tstamp = SST_TIME_STAMP_MRFLD;
+ sst->ops = &mrfld_ops;
+ return 0;
+
+ default:
+ dev_err(sst->dev,
+ "SST Driver capablities missing for dev_id: %x", sst->dev_id);
+ return -EINVAL;
+ };
+}
+
+void sst_process_pending_msg(struct work_struct *work)
+{
+ struct intel_sst_drv *ctx = container_of(work,
+ struct intel_sst_drv, ipc_post_msg_wq);
+
+ ctx->ops->post_message(ctx, NULL, false);
+}
+
+static int sst_workqueue_init(struct intel_sst_drv *ctx)
+{
+ INIT_LIST_HEAD(&ctx->memcpy_list);
+ INIT_LIST_HEAD(&ctx->rx_list);
+ INIT_LIST_HEAD(&ctx->ipc_dispatch_list);
+ INIT_LIST_HEAD(&ctx->block_list);
+ INIT_WORK(&ctx->ipc_post_msg_wq, sst_process_pending_msg);
+ init_waitqueue_head(&ctx->wait_queue);
+
+ ctx->post_msg_wq =
+ create_singlethread_workqueue("sst_post_msg_wq");
+ if (!ctx->post_msg_wq)
+ return -EBUSY;
+ return 0;
+}
+
+static void sst_init_locks(struct intel_sst_drv *ctx)
+{
+ mutex_init(&ctx->sst_lock);
+ spin_lock_init(&ctx->rx_msg_lock);
+ spin_lock_init(&ctx->ipc_spin_lock);
+ spin_lock_init(&ctx->block_lock);
+}
+
+int sst_alloc_drv_context(struct intel_sst_drv **ctx,
+ struct device *dev, unsigned int dev_id)
+{
+ *ctx = devm_kzalloc(dev, sizeof(struct intel_sst_drv), GFP_KERNEL);
+ if (!(*ctx))
+ return -ENOMEM;
+
+ (*ctx)->dev = dev;
+ (*ctx)->dev_id = dev_id;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(sst_alloc_drv_context);
+
+int sst_context_init(struct intel_sst_drv *ctx)
+{
+ int ret = 0, i;
+
+ if (!ctx->pdata)
+ return -EINVAL;
+
+ if (!ctx->pdata->probe_data)
+ return -EINVAL;
+
+ memcpy(&ctx->info, ctx->pdata->probe_data, sizeof(ctx->info));
+
+ ret = sst_driver_ops(ctx);
+ if (ret != 0)
+ return -EINVAL;
+
+ sst_init_locks(ctx);
+ sst_set_fw_state_locked(ctx, SST_RESET);
+
+ /* pvt_id 0 reserved for async messages */
+ ctx->pvt_id = 1;
+ ctx->stream_cnt = 0;
+ ctx->fw_in_mem = NULL;
+ /* we use memcpy, so set to 0 */
+ ctx->use_dma = 0;
+ ctx->use_lli = 0;
+
+ if (sst_workqueue_init(ctx))
+ return -EINVAL;
+
+ ctx->mailbox_recv_offset = ctx->pdata->ipc_info->mbox_recv_off;
+ ctx->ipc_reg.ipcx = SST_IPCX + ctx->pdata->ipc_info->ipc_offset;
+ ctx->ipc_reg.ipcd = SST_IPCD + ctx->pdata->ipc_info->ipc_offset;
+
+ dev_info(ctx->dev, "Got drv data max stream %d\n",
+ ctx->info.max_streams);
+
+ for (i = 1; i <= ctx->info.max_streams; i++) {
+ struct stream_info *stream = &ctx->streams[i];
+
+ memset(stream, 0, sizeof(*stream));
+ stream->pipe_id = PIPE_RSVD;
+ mutex_init(&stream->lock);
+ }
+
+ /* Register the ISR */
+ ret = devm_request_threaded_irq(ctx->dev, ctx->irq_num, ctx->ops->interrupt,
+ ctx->ops->irq_thread, 0, SST_DRV_NAME,
+ ctx);
+ if (ret)
+ goto do_free_mem;
+
+ dev_dbg(ctx->dev, "Registered IRQ %#x\n", ctx->irq_num);
+
+ /* default intr are unmasked so set this as masked */
+ sst_shim_write64(ctx->shim, SST_IMRX, 0xFFFF0038);
+
+ ctx->qos = devm_kzalloc(ctx->dev,
+ sizeof(struct pm_qos_request), GFP_KERNEL);
+ if (!ctx->qos) {
+ ret = -ENOMEM;
+ goto do_free_mem;
+ }
+ pm_qos_add_request(ctx->qos, PM_QOS_CPU_DMA_LATENCY,
+ PM_QOS_DEFAULT_VALUE);
+
+ dev_dbg(ctx->dev, "Requesting FW %s now...\n", ctx->firmware_name);
+ ret = request_firmware_nowait(THIS_MODULE, true, ctx->firmware_name,
+ ctx->dev, GFP_KERNEL, ctx, sst_firmware_load_cb);
+ if (ret) {
+ dev_err(ctx->dev, "Firmware download failed:%d\n", ret);
+ goto do_free_mem;
+ }
+ sst_register(ctx->dev);
+ return 0;
+
+do_free_mem:
+ destroy_workqueue(ctx->post_msg_wq);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(sst_context_init);
+
+void sst_context_cleanup(struct intel_sst_drv *ctx)
+{
+ pm_runtime_get_noresume(ctx->dev);
+ pm_runtime_disable(ctx->dev);
+ sst_unregister(ctx->dev);
+ sst_set_fw_state_locked(ctx, SST_SHUTDOWN);
+ flush_scheduled_work();
+ destroy_workqueue(ctx->post_msg_wq);
+ pm_qos_remove_request(ctx->qos);
+ kfree(ctx->fw_sg_list.src);
+ kfree(ctx->fw_sg_list.dst);
+ ctx->fw_sg_list.list_len = 0;
+ kfree(ctx->fw_in_mem);
+ ctx->fw_in_mem = NULL;
+ sst_memcpy_free_resources(ctx);
+ ctx = NULL;
+}
+EXPORT_SYMBOL_GPL(sst_context_cleanup);
+
+static inline void sst_save_shim64(struct intel_sst_drv *ctx,
+ void __iomem *shim,
+ struct sst_shim_regs64 *shim_regs)
+{
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&ctx->ipc_spin_lock, irq_flags);
+
+ shim_regs->imrx = sst_shim_read64(shim, SST_IMRX),
+
+ spin_unlock_irqrestore(&ctx->ipc_spin_lock, irq_flags);
+}
+
+static inline void sst_restore_shim64(struct intel_sst_drv *ctx,
+ void __iomem *shim,
+ struct sst_shim_regs64 *shim_regs)
+{
+ unsigned long irq_flags;
+
+ /*
+ * we only need to restore IMRX for this case, rest will be
+ * initialize by FW or driver when firmware is loaded
+ */
+ spin_lock_irqsave(&ctx->ipc_spin_lock, irq_flags);
+ sst_shim_write64(shim, SST_IMRX, shim_regs->imrx),
+ spin_unlock_irqrestore(&ctx->ipc_spin_lock, irq_flags);
+}
+
+void sst_configure_runtime_pm(struct intel_sst_drv *ctx)
+{
+ pm_runtime_set_autosuspend_delay(ctx->dev, SST_SUSPEND_DELAY);
+ pm_runtime_use_autosuspend(ctx->dev);
+ /*
+ * For acpi devices, the actual physical device state is
+ * initially active. So change the state to active before
+ * enabling the pm
+ */
+ pm_runtime_enable(ctx->dev);
+
+ if (acpi_disabled)
+ pm_runtime_set_active(ctx->dev);
+ else
+ pm_runtime_put_noidle(ctx->dev);
+
+ sst_save_shim64(ctx, ctx->shim, ctx->shim_regs64);
+}
+EXPORT_SYMBOL_GPL(sst_configure_runtime_pm);
+
+static int intel_sst_runtime_suspend(struct device *dev)
+{
+ int ret = 0;
+ struct intel_sst_drv *ctx = dev_get_drvdata(dev);
+
+ if (ctx->sst_state == SST_RESET) {
+ dev_dbg(dev, "LPE is already in RESET state, No action\n");
+ return 0;
+ }
+ /* save fw context */
+ if (ctx->ops->save_dsp_context(ctx))
+ return -EBUSY;
+
+ /* Move the SST state to Reset */
+ sst_set_fw_state_locked(ctx, SST_RESET);
+
+ synchronize_irq(ctx->irq_num);
+ flush_workqueue(ctx->post_msg_wq);
+
+ /* save the shim registers because PMC doesn't save state */
+ sst_save_shim64(ctx, ctx->shim, ctx->shim_regs64);
+
+ return ret;
+}
+
+static int intel_sst_runtime_resume(struct device *dev)
+{
+ int ret = 0;
+ struct intel_sst_drv *ctx = dev_get_drvdata(dev);
+
+ if (ctx->sst_state == SST_RESET) {
+ ret = sst_load_fw(ctx);
+ if (ret) {
+ dev_err(dev, "FW download fail %d\n", ret);
+ sst_set_fw_state_locked(ctx, SST_RESET);
+ }
+ }
+ return ret;
+}
+
+const struct dev_pm_ops intel_sst_pm = {
+ .runtime_suspend = intel_sst_runtime_suspend,
+ .runtime_resume = intel_sst_runtime_resume,
+};
+EXPORT_SYMBOL_GPL(intel_sst_pm);
OpenPOWER on IntegriCloud